Re: [petsc-users] Inconsistent PETSc MUMPS statistics

2022-01-16 Thread Varun Hiremath
Hi Jose, Pierre, Yes, I am not using ParMetis or Metis. This is how I am configuring PETSc: $ ./configure --with-debugging=no --with-mpi-dir= --with-scalar-type=complex --download-mumps --download-scalapack --with-blaslapack-dir= Would you happen to know if there is any option available to force

Re: [petsc-users] Inconsistent PETSc MUMPS statistics

2022-01-16 Thread Pierre Jolivet
Default renumbering is sequential. Since --download-parmetis requires --download-metis, I doubt Varun is using ParMETIS since the appropriate ICNTL flag is not explicitly set. If we go back to the original “issue”, I believe this is because you are doing an LU factorization with a large number

Re: [petsc-users] Inconsistent PETSc MUMPS statistics

2022-01-16 Thread Jose E. Roman
Probably someone else can give a better answer, but if I remember correctly ParMetis relies on certain random number generator that makes it produce different partitions for different runs. I think this was fixed in the ParMetis that --download-parmetis installs, but if I am not wrong you are